Real-World Scenarios
Case studies from the field. Read the situation, decide what you would do, then reveal each step to compare your plan against a guided answer.
Site
Annual test at a two-story elementary school, addressable FACP with four Class B NACs. The building is occupied; your test window is 3:30–5:00 PM.
FACP · Panel display
TROUBLE: NAC 2 OPEN
NOTIFICATION CIRCUIT 2 · EAST WING
What you find on arrival
During the first alarm test the west-wing horn/strobes operate, but the four horn/strobes in the east-wing corridor stay silent and dark. When you reset, the panel posts a NAC 2 OPEN trouble that the custodian says 'comes and goes.'
What do you do?
You have 90 minutes with the building. How do you find why NAC 2 is open — and why it's intermittent?